Performance Evaluation Of MPEG-4 Coded Video Transmission Over A Tetra Mobile Channel

Chang, Yoong Choon (2003) Performance Evaluation Of MPEG-4 Coded Video Transmission Over A Tetra Mobile Channel. Masters thesis, Multimedia University.

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Abstract

TETRA (Terrestrial Trunked Radio) private Mobile Radio (PMR) was developed with support of European Telecommunications Standard Institute (ETSI) by the cooperation of manufacturers, users, and operators primarily to bring the benefits of standardisation to PMR. before this, every country in Europe had its own variant of PMR, based on its own signalling protocols, frequency allocation and regulatory framework. The TETRA standard supports communications of simultaneous voice and data. This brings significant benefits to both public safety and commercial users in that it enables a range of multimedia applications to be integarated with voice services. This thesis deals with a research project dealing with transmission of MPEG-4 encoded video over TETRA mobile channels. The deployment of a reliable and efficient video communication service over TETRA mobile channels and the high channel error rates. For these reasons, the effective transmission of video over TETRA mobile channels requires not only the use of efficient compression techniques capable of reducing the bandwidth demand, but also the use of error-resilient video coding. The ISO MPEG-4 video compression standard is the right choice to fulfill the two requirements and is tehrefore the subject of study in this thesis. This thesis present a study of MPEG-4 encoded video transmission over TETRA channels. MATLAB has been used to simulate the transmission of MPEG-4 encoded video over TETRA channel. Simulations have been carried out using 60 frames Sales and Claire video sequence at QCIF (176x144 pixels) resolution. The original raw video sequences were MPEG-4 coded to 5 frames per second using MPEG-4 visual simple profile encoder, channel coded with TETRA Rate Compatible Punctured Convolutional (RCPC) channel encoding scheme and transmitted over an Additive White Gau ssian Noise(AWGN) channel using TETRA p 4-DQPSK ( Differential Quadrature Phase Shift keying) modulation. The propagation conditions were those specified in TETRA as TU50 at 400MHz carrier frequency. The TU channel model presents the multipath propagation conditions found in typical urban conditions, and in the particular conditions used in these experiments, a mobile terminal velocity of 50 km hr was assumed. At the receiver side, the receiver is subject to Additive White Gaussian Noise (AWGN) and hard decision Viterbi channel decoding is used. MPEG-4 visual simple profile error resilient tools, namely Resynchronisation Marker, Header Extension Code, Data Partitioning and Reversible Variable Length Codes have been used in this simulation work. Tests have been performed under different levels of AWGN. MPEG-4 video quality measured in peak signal to noise ratio (PSNR) that can be obtained at different channel conditions will be presented in this thesis. In addition, the effectiveness of MPEG-4 video error resilient tools over TETRA channels will be presented in this thesis as well.

Item Type: Thesis (Masters)
Subjects: L Education > LB Theory and practice of education > LB2300 Higher Education
Divisions: Faculty of Engineering (FOE)
Depositing User: Mr Shaharom Nizam Mohamed
Date Deposited: 03 Dec 2009 07:40
Last Modified: 04 Dec 2009 10:32
URI: http://shdl.mmu.edu.my/id/eprint/46

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